/mandos/release : revision 237.7.392

1

#!/usr/bin/python2.7

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#!/usr/bin/python

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# -*- mode: python; coding: utf-8 -*-

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#

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# Mandos server - give out binary blobs to connecting clients.

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# "AvahiService" class, and some lines in "main".

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#

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# Everything else is

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#

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# This program is free software: you can redistribute it and/or modify

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# it under the terms of the GNU General Public License as published by

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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from future_builtins import *

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try:

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from future_builtins import *

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except ImportError:

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pass

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try:

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import SocketServer as socketserver

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import argparse

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import datetime

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import errno

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import gnutls.crypto

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import gnutls.connection

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import gnutls.errors

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import gnutls.library.functions

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import gnutls.library.constants

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import gnutls.library.types

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try:

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import ConfigParser as configparser

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except ImportError:

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import tempfile

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import itertools

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import collections

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import codecs

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import dbus

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import dbus.service

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try:

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import gobject

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except ImportError:

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from gi.repository import GObject as gobject

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import avahi

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from gi.repository import GLib

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from dbus.mainloop.glib import DBusGMainLoop

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import ctypes

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import ctypes.util

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if sys.version_info.major == 2:

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str = unicode

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version = "1.6.9"

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version = "1.7.7"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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return interface_index

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def copy_function(func):

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"""Make a copy of a function"""

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if sys.version_info.major == 2:

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return types.FunctionType(func.func_code,

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func.func_globals,

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func.func_name,

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func.func_defaults,

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func.func_closure)

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else:

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return types.FunctionType(func.__code__,

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func.__globals__,

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func.__name__,

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func.__defaults__,

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func.__closure__)

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def initlogger(debug, level=logging.WARNING):

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"""init logger and add loglevel"""

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def __init__(self):

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self.tempdir = tempfile.mkdtemp(prefix="mandos-")

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self.gpg = "gpg"

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try:

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output = subprocess.check_output(["gpgconf"])

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for line in output.splitlines():

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name, text, path = line.split(b":")

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if name == "gpg":

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self.gpg = path

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break

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except OSError as e:

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if e.errno != errno.ENOENT:

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raise

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self.gnupgargs = ['--batch',

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'--home', self.tempdir,

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'--homedir', self.tempdir,

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'--force-mdc',

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'--quiet',

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'--no-use-agent']

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dir=self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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proc = subprocess.Popen(['gpg', '--symmetric',

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proc = subprocess.Popen([self.gpg, '--symmetric',

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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dir = self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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proc = subprocess.Popen(['gpg', '--decrypt',

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proc = subprocess.Popen([self.gpg, '--decrypt',

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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raise PGPError(err)

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return decrypted_plaintext

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# Pretend that we have an Avahi module

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class Avahi(object):

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"""This isn't so much a class as it is a module-like namespace.

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It is instantiated once, and simulates having an Avahi module."""

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IF_UNSPEC = -1 # avahi-common/address.h

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PROTO_UNSPEC = -1 # avahi-common/address.h

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PROTO_INET = 0 # avahi-common/address.h

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PROTO_INET6 = 1 # avahi-common/address.h

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DBUS_NAME = "org.freedesktop.Avahi"

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DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"

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DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"

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DBUS_PATH_SERVER = "/"

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def string_array_to_txt_array(self, t):

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return dbus.Array((dbus.ByteArray(s.encode("utf-8"))

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for s in t), signature="ay")

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ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h

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ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h

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ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h

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SERVER_INVALID = 0 # avahi-common/defs.h

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SERVER_REGISTERING = 1 # avahi-common/defs.h

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SERVER_RUNNING = 2 # avahi-common/defs.h

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SERVER_COLLISION = 3 # avahi-common/defs.h

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SERVER_FAILURE = 4 # avahi-common/defs.h

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avahi = Avahi()

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class AvahiError(Exception):

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def __init__(self, value, *args, **kwargs):

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logger.error(bad_states[state] + ": %r", error)

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self.cleanup()

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elif state == avahi.SERVER_RUNNING:

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self.add()

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try:

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self.add()

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except dbus.exceptions.DBusException as error:

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if (error.get_dbus_name()

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== "org.freedesktop.Avahi.CollisionError"):

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logger.info("Local Zeroconf service name"

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" collision.")

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return self.rename(remove=False)

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else:

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logger.critical("D-Bus Exception", exc_info=error)

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self.cleanup()

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os._exit(1)

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else:

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if error is None:

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logger.debug("Unknown state: %r", state)

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.format(self.name)))

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return ret

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def subprocess_call_pipe(connection, # : multiprocessing.Connection

427

*args, **kwargs):

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# Pretend that we have a GnuTLS module

483

class GnuTLS(object):

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"""This isn't so much a class as it is a module-like namespace.

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It is instantiated once, and simulates having a GnuTLS module."""

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_library = ctypes.cdll.LoadLibrary(

488

ctypes.util.find_library("gnutls"))

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_need_version = b"3.3.0"

490

def __init__(self):

491

# Need to use class name "GnuTLS" here, since this method is

492

# called before the assignment to the "gnutls" global variable

493

# happens.

494

if GnuTLS.check_version(self._need_version) is None:

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raise GnuTLS.Error("Needs GnuTLS {} or later"

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.format(self._need_version))

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# Unless otherwise indicated, the constants and types below are

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# all from the gnutls/gnutls.h C header file.

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# Constants

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E_SUCCESS = 0

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E_INTERRUPTED = -52

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E_AGAIN = -28

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CRT_OPENPGP = 2

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CLIENT = 2

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SHUT_RDWR = 0

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CRD_CERTIFICATE = 1

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E_NO_CERTIFICATE_FOUND = -49

510

OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

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# Types

513

class session_int(ctypes.Structure):

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_fields_ = []

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session_t = ctypes.POINTER(session_int)

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class certificate_credentials_st(ctypes.Structure):

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_fields_ = []

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certificate_credentials_t = ctypes.POINTER(

519

certificate_credentials_st)

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certificate_type_t = ctypes.c_int

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class datum_t(ctypes.Structure):

522

_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),

523

('size', ctypes.c_uint)]

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class openpgp_crt_int(ctypes.Structure):

525

_fields_ = []

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openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

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openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

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log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)

529

credentials_type_t = ctypes.c_int

530

transport_ptr_t = ctypes.c_void_p

531

close_request_t = ctypes.c_int

532

533

# Exceptions

534

class Error(Exception):

535

# We need to use the class name "GnuTLS" here, since this

536

# exception might be raised from within GnuTLS.__init__,

537

# which is called before the assignment to the "gnutls"

538

# global variable has happened.

539

def __init__(self, message = None, code = None, args=()):

540

# Default usage is by a message string, but if a return

541

# code is passed, convert it to a string with

542

# gnutls.strerror()

543

self.code = code

544

if message is None and code is not None:

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message = GnuTLS.strerror(code)

546

return super(GnuTLS.Error, self).__init__(

547

message, *args)

548

549

class CertificateSecurityError(Error):

550

pass

551

552

# Classes

553

class Credentials(object):

554

def __init__(self):

555

self._c_object = gnutls.certificate_credentials_t()

556

gnutls.certificate_allocate_credentials(

557

ctypes.byref(self._c_object))

558

self.type = gnutls.CRD_CERTIFICATE

559

560

def __del__(self):

561

gnutls.certificate_free_credentials(self._c_object)

562

563

class ClientSession(object):

564

def __init__(self, socket, credentials = None):

565

self._c_object = gnutls.session_t()

566

gnutls.init(ctypes.byref(self._c_object), gnutls.CLIENT)

567

gnutls.set_default_priority(self._c_object)

568

gnutls.transport_set_ptr(self._c_object, socket.fileno())

569

gnutls.handshake_set_private_extensions(self._c_object,

570

True)

571

self.socket = socket

572

if credentials is None:

573

credentials = gnutls.Credentials()

574

gnutls.credentials_set(self._c_object, credentials.type,

575

ctypes.cast(credentials._c_object,

576

ctypes.c_void_p))

577

self.credentials = credentials

578

579

def __del__(self):

580

gnutls.deinit(self._c_object)

581

582

def handshake(self):

583

return gnutls.handshake(self._c_object)

584

585

def send(self, data):

586

data = bytes(data)

587

data_len = len(data)

588

while data_len > 0:

589

data_len -= gnutls.record_send(self._c_object,

590

data[-data_len:],

591

data_len)

592

593

def bye(self):

594

return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)

595

596

# Error handling functions

597

def _error_code(result):

598

"""A function to raise exceptions on errors, suitable

599

for the 'restype' attribute on ctypes functions"""

600

if result >= 0:

601

return result

602

if result == gnutls.E_NO_CERTIFICATE_FOUND:

603

raise gnutls.CertificateSecurityError(code = result)

604

raise gnutls.Error(code = result)

605

606

def _retry_on_error(result, func, arguments):

607

"""A function to retry on some errors, suitable

608

for the 'errcheck' attribute on ctypes functions"""

609

while result < 0:

610

if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):

611

return _error_code(result)

612

result = func(*arguments)

613

return result

614

615

# Unless otherwise indicated, the function declarations below are

616

# all from the gnutls/gnutls.h C header file.

617

618

# Functions

619

priority_set_direct = _library.gnutls_priority_set_direct

620

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

621

ctypes.POINTER(ctypes.c_char_p)]

622

priority_set_direct.restype = _error_code

623

624

init = _library.gnutls_init

625

init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]

626

init.restype = _error_code

627

628

set_default_priority = _library.gnutls_set_default_priority

629

set_default_priority.argtypes = [session_t]

630

set_default_priority.restype = _error_code

631

632

record_send = _library.gnutls_record_send

633

record_send.argtypes = [session_t, ctypes.c_void_p,

634

ctypes.c_size_t]

635

record_send.restype = ctypes.c_ssize_t

636

record_send.errcheck = _retry_on_error

637

638

certificate_allocate_credentials = (

639

_library.gnutls_certificate_allocate_credentials)

640

certificate_allocate_credentials.argtypes = [

641

ctypes.POINTER(certificate_credentials_t)]

642

certificate_allocate_credentials.restype = _error_code

643

644

certificate_free_credentials = (

645

_library.gnutls_certificate_free_credentials)

646

certificate_free_credentials.argtypes = [certificate_credentials_t]

647

certificate_free_credentials.restype = None

648

649

handshake_set_private_extensions = (

650

_library.gnutls_handshake_set_private_extensions)

651

handshake_set_private_extensions.argtypes = [session_t,

652

ctypes.c_int]

653

handshake_set_private_extensions.restype = None

654

655

credentials_set = _library.gnutls_credentials_set

656

credentials_set.argtypes = [session_t, credentials_type_t,

657

ctypes.c_void_p]

658

credentials_set.restype = _error_code

659

660

strerror = _library.gnutls_strerror

661

strerror.argtypes = [ctypes.c_int]

662

strerror.restype = ctypes.c_char_p

663

664

certificate_type_get = _library.gnutls_certificate_type_get

665

certificate_type_get.argtypes = [session_t]

666

certificate_type_get.restype = _error_code

667

668

certificate_get_peers = _library.gnutls_certificate_get_peers

669

certificate_get_peers.argtypes = [session_t,

670

ctypes.POINTER(ctypes.c_uint)]

671

certificate_get_peers.restype = ctypes.POINTER(datum_t)

672

673

global_set_log_level = _library.gnutls_global_set_log_level

674

global_set_log_level.argtypes = [ctypes.c_int]

675

global_set_log_level.restype = None

676

677

global_set_log_function = _library.gnutls_global_set_log_function

678

global_set_log_function.argtypes = [log_func]

679

global_set_log_function.restype = None

680

681

deinit = _library.gnutls_deinit

682

deinit.argtypes = [session_t]

683

deinit.restype = None

684

685

handshake = _library.gnutls_handshake

686

handshake.argtypes = [session_t]

687

handshake.restype = _error_code

688

handshake.errcheck = _retry_on_error

689

690

transport_set_ptr = _library.gnutls_transport_set_ptr

691

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

692

transport_set_ptr.restype = None

693

694

bye = _library.gnutls_bye

695

bye.argtypes = [session_t, close_request_t]

696

bye.restype = _error_code

697

bye.errcheck = _retry_on_error

698

699

check_version = _library.gnutls_check_version

700

check_version.argtypes = [ctypes.c_char_p]

701

check_version.restype = ctypes.c_char_p

702

703

# All the function declarations below are from gnutls/openpgp.h

704

705

openpgp_crt_init = _library.gnutls_openpgp_crt_init

706

openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]

707

openpgp_crt_init.restype = _error_code

708

709

openpgp_crt_import = _library.gnutls_openpgp_crt_import

710

openpgp_crt_import.argtypes = [openpgp_crt_t,

711

ctypes.POINTER(datum_t),

712

openpgp_crt_fmt_t]

713

openpgp_crt_import.restype = _error_code

714

715

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

716

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

717

ctypes.POINTER(ctypes.c_uint)]

718

openpgp_crt_verify_self.restype = _error_code

719

720

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

721

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

722

openpgp_crt_deinit.restype = None

723

724

openpgp_crt_get_fingerprint = (

725

_library.gnutls_openpgp_crt_get_fingerprint)

726

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

727

ctypes.c_void_p,

728

ctypes.POINTER(

729

ctypes.c_size_t)]

730

openpgp_crt_get_fingerprint.restype = _error_code

731

732

# Remove non-public functions

733

del _error_code, _retry_on_error

734

# Create the global "gnutls" object, simulating a module

735

gnutls = GnuTLS()

736

737

def call_pipe(connection, # : multiprocessing.Connection

738

func, *args, **kwargs):

428

739

"""This function is meant to be called by multiprocessing.Process

429

740

430

This function runs a synchronous subprocess.call(), and writes the

431

resulting return code on the provided multiprocessing.Connection.

741

This function runs func(*args, **kwargs), and writes the resulting

742

return value on the provided multiprocessing.Connection.

432

743

"""

433

connection.send(subprocess.call(*args, **kwargs))

744

connection.send(func(*args, **kwargs))

434

745

connection.close()

435

746

436

747

class Client(object):

443

754

checker: subprocess.Popen(); a running checker process used

444

755

to see if the client lives.

445

756

'None' if no process is running.

446

checker_callback_tag: a gobject event source tag, or None

757

checker_callback_tag: a GLib event source tag, or None

447

758

checker_command: string; External command which is run to check

448

759

if client lives. %() expansions are done at

449

760

runtime with vars(self) as dict, so that for

450

761

instance %(name)s can be used in the command.

451

checker_initiator_tag: a gobject event source tag, or None

762

checker_initiator_tag: a GLib event source tag, or None

452

763

created: datetime.datetime(); (UTC) object creation

453

764

client_structure: Object describing what attributes a client has

454

765

and is used for storing the client at exit

455

766

current_checker_command: string; current running checker_command

456

disable_initiator_tag: a gobject event source tag, or None

767

disable_initiator_tag: a GLib event source tag, or None

457

768

enabled: bool()

458

769

fingerprint: string (40 or 32 hexadecimal digits); used to

459

770

uniquely identify the client

522

833

client["fingerprint"] = (section["fingerprint"].upper()

523

834

.replace(" ", ""))

524

835

if "secret" in section:

525

client["secret"] = section["secret"].decode("base64")

836

client["secret"] = codecs.decode(section["secret"]

837

.encode("utf-8"),

838

"base64")

526

839

elif "secfile" in section:

527

840

with open(os.path.expanduser(os.path.expandvars

528

841

(section["secfile"])),

581

894

self.changedstate = multiprocessing_manager.Condition(

582

895

multiprocessing_manager.Lock())

583

896

self.client_structure = [attr

584

for attr in self.__dict__.iterkeys()

897

for attr in self.__dict__.keys()

585

898

if not attr.startswith("_")]

586

899

self.client_structure.append("client_structure")

587

900

613

926

if not quiet:

614

927

logger.info("Disabling client %s", self.name)

615

928

if getattr(self, "disable_initiator_tag", None) is not None:

616

gobject.source_remove(self.disable_initiator_tag)

929

GLib.source_remove(self.disable_initiator_tag)

617

930

self.disable_initiator_tag = None

618

931

self.expires = None

619

932

if getattr(self, "checker_initiator_tag", None) is not None:

620

gobject.source_remove(self.checker_initiator_tag)

933

GLib.source_remove(self.checker_initiator_tag)

621

934

self.checker_initiator_tag = None

622

935

self.stop_checker()

623

936

self.enabled = False

624

937

if not quiet:

625

938

self.send_changedstate()

626

# Do not run this again if called by a gobject.timeout_add

939

# Do not run this again if called by a GLib.timeout_add

627

940

return False

628

941

629

942

def __del__(self):

633

946

# Schedule a new checker to be started an 'interval' from now,

634

947

# and every interval from then on.

635

948

if self.checker_initiator_tag is not None:

636

gobject.source_remove(self.checker_initiator_tag)

637

self.checker_initiator_tag = gobject.timeout_add(

949

GLib.source_remove(self.checker_initiator_tag)

950

self.checker_initiator_tag = GLib.timeout_add(

638

951

int(self.interval.total_seconds() * 1000),

639

952

self.start_checker)

640

953

# Schedule a disable() when 'timeout' has passed

641

954

if self.disable_initiator_tag is not None:

642

gobject.source_remove(self.disable_initiator_tag)

643

self.disable_initiator_tag = gobject.timeout_add(

955

GLib.source_remove(self.disable_initiator_tag)

956

self.disable_initiator_tag = GLib.timeout_add(

644

957

int(self.timeout.total_seconds() * 1000), self.disable)

645

958

# Also start a new checker *right now*.

646

959

self.start_checker()

647

960

648

def checker_callback(self, source, condition,

649

(connection, command)):

961

def checker_callback(self, source, condition, connection,

962

command):

650

963

"""The checker has completed, so take appropriate actions."""

651

964

self.checker_callback_tag = None

652

965

self.checker = None

653

# Read return code from connection (see subprocess_call_pipe)

966

# Read return code from connection (see call_pipe)

654

967

returncode = connection.recv()

655

968

connection.close()

656

969

682

995

if timeout is None:

683

996

timeout = self.timeout

684

997

if self.disable_initiator_tag is not None:

685

gobject.source_remove(self.disable_initiator_tag)

998

GLib.source_remove(self.disable_initiator_tag)

686

999

self.disable_initiator_tag = None

687

1000

if getattr(self, "enabled", False):

688

self.disable_initiator_tag = gobject.timeout_add(

1001

self.disable_initiator_tag = GLib.timeout_add(

689

1002

int(timeout.total_seconds() * 1000), self.disable)

690

1003

self.expires = datetime.datetime.utcnow() + timeout

691

1004

740

1053

and self.server_settings["foreground"]):

741

1054

popen_args.update({"stdout": wnull,

742

1055

"stderr": wnull })

743

pipe = multiprocessing.Pipe(duplex=False)

1056

pipe = multiprocessing.Pipe(duplex = False)

744

1057

self.checker = multiprocessing.Process(

745

target=subprocess_call_pipe, args=(pipe[1], command),

746

kwargs=popen_args)

1058

target = call_pipe,

1059

args = (pipe[1], subprocess.call, command),

1060

kwargs = popen_args)

747

1061

self.checker.start()

748

self.checker_callback_tag = gobject.io_add_watch(

749

pipe[0].fileno(), gobject.IO_IN,

750

self.checker_callback, (pipe[0], command))

751

# Re-run this periodically if run by gobject.timeout_add

1062

self.checker_callback_tag = GLib.io_add_watch(

1063

pipe[0].fileno(), GLib.IO_IN,

1064

self.checker_callback, pipe[0], command)

1065

# Re-run this periodically if run by GLib.timeout_add

752

1066

return True

753

1067

754

1068

def stop_checker(self):

755

1069

"""Force the checker process, if any, to stop."""

756

1070

if self.checker_callback_tag:

757

gobject.source_remove(self.checker_callback_tag)

1071

GLib.source_remove(self.checker_callback_tag)

758

1072

self.checker_callback_tag = None

759

1073

if getattr(self, "checker", None) is None:

760

1074

return

829

1143

access="r")

830

1144

def Property_dbus_property(self):

831

1145

return dbus.Boolean(False)

1146

1147

See also the DBusObjectWithAnnotations class.

832

1148

"""

833

1149

834

1150

def decorator(func):

856

1172

pass

857

1173

858

1174

859

class DBusObjectWithProperties(dbus.service.Object):

860

"""A D-Bus object with properties.

1175

class DBusObjectWithAnnotations(dbus.service.Object):

1176

"""A D-Bus object with annotations.

861

1177

862

Classes inheriting from this can use the dbus_service_property

863

decorator to expose methods as D-Bus properties. It exposes the

864

standard Get(), Set(), and GetAll() methods on the D-Bus.

1178

Classes inheriting from this can use the dbus_annotations

1179

decorator to add annotations to methods or signals.

865

1180

"""

866

1181

867

1182

@staticmethod

883

1198

for name, athing in

884

1199

inspect.getmembers(cls, self._is_dbus_thing(thing)))

885

1200

1201

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1202

out_signature = "s",

1203

path_keyword = 'object_path',

1204

connection_keyword = 'connection')

1205

def Introspect(self, object_path, connection):

1206

"""Overloading of standard D-Bus method.

1207

1208

Inserts annotation tags on methods and signals.

1209

"""

1210

xmlstring = dbus.service.Object.Introspect(self, object_path,

1211

connection)

1212

try:

1213

document = xml.dom.minidom.parseString(xmlstring)

1214

1215

for if_tag in document.getElementsByTagName("interface"):

1216

# Add annotation tags

1217

for typ in ("method", "signal"):

1218

for tag in if_tag.getElementsByTagName(typ):

1219

annots = dict()

1220

for name, prop in (self.

1221

_get_all_dbus_things(typ)):

1222

if (name == tag.getAttribute("name")

1223

and prop._dbus_interface

1224

== if_tag.getAttribute("name")):

1225

annots.update(getattr(

1226

prop, "_dbus_annotations", {}))

1227

for name, value in annots.items():

1228

ann_tag = document.createElement(

1229

"annotation")

1230

ann_tag.setAttribute("name", name)

1231

ann_tag.setAttribute("value", value)

1232

tag.appendChild(ann_tag)

1233

# Add interface annotation tags

1234

for annotation, value in dict(

1235

itertools.chain.from_iterable(

1236

annotations().items()

1237

for name, annotations

1238

in self._get_all_dbus_things("interface")

1239

if name == if_tag.getAttribute("name")

1240

)).items():

1241

ann_tag = document.createElement("annotation")

1242

ann_tag.setAttribute("name", annotation)

1243

ann_tag.setAttribute("value", value)

1244

if_tag.appendChild(ann_tag)

1245

# Fix argument name for the Introspect method itself

1246

if (if_tag.getAttribute("name")

1247

== dbus.INTROSPECTABLE_IFACE):

1248

for cn in if_tag.getElementsByTagName("method"):

1249

if cn.getAttribute("name") == "Introspect":

1250

for arg in cn.getElementsByTagName("arg"):

1251

if (arg.getAttribute("direction")

1252

== "out"):

1253

arg.setAttribute("name",

1254

"xml_data")

1255

xmlstring = document.toxml("utf-8")

1256

document.unlink()

1257

except (AttributeError, xml.dom.DOMException,

1258

xml.parsers.expat.ExpatError) as error:

1259

logger.error("Failed to override Introspection method",

1260

exc_info=error)

1261

return xmlstring

1262

1263

1264

class DBusObjectWithProperties(DBusObjectWithAnnotations):

1265

"""A D-Bus object with properties.

1266

1267

Classes inheriting from this can use the dbus_service_property

1268

decorator to expose methods as D-Bus properties. It exposes the

1269

standard Get(), Set(), and GetAll() methods on the D-Bus.

1270

"""

1271

886

1272

def _get_dbus_property(self, interface_name, property_name):

887

1273

"""Returns a bound method if one exists which is a D-Bus

888

1274

property with the specified name and interface.

898

1284

raise DBusPropertyNotFound("{}:{}.{}".format(

899

1285

self.dbus_object_path, interface_name, property_name))

900

1286

1287

@classmethod

1288

def _get_all_interface_names(cls):

1289

"""Get a sequence of all interfaces supported by an object"""

1290

return (name for name in set(getattr(getattr(x, attr),

1291

"_dbus_interface", None)

1292

for x in (inspect.getmro(cls))

1293

for attr in dir(x))

1294

if name is not None)

1295

901

1296

@dbus.service.method(dbus.PROPERTIES_IFACE,

902

1297

in_signature="ss",

903

1298

out_signature="v")

973

1368

974

1369

Inserts property tags and interface annotation tags.

975

1370

"""

976

xmlstring = dbus.service.Object.Introspect(self, object_path,

977

connection)

1371

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1372

object_path,

1373

connection)

978

1374

try:

979

1375

document = xml.dom.minidom.parseString(xmlstring)

980

1376

993

1389

if prop._dbus_interface

994

1390

== if_tag.getAttribute("name")):

995

1391

if_tag.appendChild(tag)

996

# Add annotation tags

997

for typ in ("method", "signal", "property"):

998

for tag in if_tag.getElementsByTagName(typ):

999

annots = dict()

1000

for name, prop in (self.

1001

_get_all_dbus_things(typ)):

1002

if (name == tag.getAttribute("name")

1003

and prop._dbus_interface

1004

== if_tag.getAttribute("name")):

1005

annots.update(getattr(

1006

prop, "_dbus_annotations", {}))

1007

for name, value in annots.items():

1008

ann_tag = document.createElement(

1009

"annotation")

1010

ann_tag.setAttribute("name", name)

1011

ann_tag.setAttribute("value", value)

1012

tag.appendChild(ann_tag)

1013

# Add interface annotation tags

1014

for annotation, value in dict(

1015

itertools.chain.from_iterable(

1016

annotations().items()

1017

for name, annotations

1018

in self._get_all_dbus_things("interface")

1019

if name == if_tag.getAttribute("name")

1020

)).items():

1021

ann_tag = document.createElement("annotation")

1022

ann_tag.setAttribute("name", annotation)

1023

ann_tag.setAttribute("value", value)

1024

if_tag.appendChild(ann_tag)

1392

# Add annotation tags for properties

1393

for tag in if_tag.getElementsByTagName("property"):

1394

annots = dict()

1395

for name, prop in self._get_all_dbus_things(

1396

"property"):

1397

if (name == tag.getAttribute("name")

1398

and prop._dbus_interface

1399

== if_tag.getAttribute("name")):

1400

annots.update(getattr(

1401

prop, "_dbus_annotations", {}))

1402

for name, value in annots.items():

1403

ann_tag = document.createElement(

1404

"annotation")

1405

ann_tag.setAttribute("name", name)

1406

ann_tag.setAttribute("value", value)

1407

tag.appendChild(ann_tag)

1025

1408

# Add the names to the return values for the

1026

1409

# "org.freedesktop.DBus.Properties" methods

1027

1410

if (if_tag.getAttribute("name")

1045

1428

exc_info=error)

1046

1429

return xmlstring

1047

1430

1431

try:

1432

dbus.OBJECT_MANAGER_IFACE

1433

except AttributeError:

1434

dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"

1435

1436

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1437

"""A D-Bus object with an ObjectManager.

1438

1439

Classes inheriting from this exposes the standard

1440

GetManagedObjects call and the InterfacesAdded and

1441

InterfacesRemoved signals on the standard

1442

"org.freedesktop.DBus.ObjectManager" interface.

1443

1444

Note: No signals are sent automatically; they must be sent

1445

manually.

1446

"""

1447

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1448

out_signature = "a{oa{sa{sv}}}")

1449

def GetManagedObjects(self):

1450

"""This function must be overridden"""

1451

raise NotImplementedError()

1452

1453

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1454

signature = "oa{sa{sv}}")

1455

def InterfacesAdded(self, object_path, interfaces_and_properties):

1456

pass

1457

1458

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature = "oas")

1459

def InterfacesRemoved(self, object_path, interfaces):

1460

pass

1461

1462

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1463

out_signature = "s",

1464

path_keyword = 'object_path',

1465

connection_keyword = 'connection')

1466

def Introspect(self, object_path, connection):

1467

"""Overloading of standard D-Bus method.

1468

1469

Override return argument name of GetManagedObjects to be

1470

"objpath_interfaces_and_properties"

1471

"""

1472

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1473

object_path,

1474

connection)

1475

try:

1476

document = xml.dom.minidom.parseString(xmlstring)

1477

1478

for if_tag in document.getElementsByTagName("interface"):

1479

# Fix argument name for the GetManagedObjects method

1480

if (if_tag.getAttribute("name")

1481

== dbus.OBJECT_MANAGER_IFACE):

1482

for cn in if_tag.getElementsByTagName("method"):

1483

if (cn.getAttribute("name")

1484

== "GetManagedObjects"):

1485

for arg in cn.getElementsByTagName("arg"):

1486

if (arg.getAttribute("direction")

1487

== "out"):

1488

arg.setAttribute(

1489

"name",

1490

"objpath_interfaces"

1491

"_and_properties")

1492

xmlstring = document.toxml("utf-8")

1493

document.unlink()

1494

except (AttributeError, xml.dom.DOMException,

1495

xml.parsers.expat.ExpatError) as error:

1496

logger.error("Failed to override Introspection method",

1497

exc_info = error)

1498

return xmlstring

1048

1499

1049

1500

def datetime_to_dbus(dt, variant_level=0):

1050

1501

"""Convert a UTC datetime.datetime() to a D-Bus type."""

1099

1550

if getattr(attribute, "_dbus_is_signal", False):

1100

1551

# Extract the original non-method undecorated

1101

1552

# function by black magic

1102

nonmethod_func = (dict(

1103

zip(attribute.func_code.co_freevars,

1104

attribute.__closure__))

1105

["func"].cell_contents)

1553

if sys.version_info.major == 2:

1554

nonmethod_func = (dict(

1555

zip(attribute.func_code.co_freevars,

1556

attribute.__closure__))

1557

["func"].cell_contents)

1558

else:

1559

nonmethod_func = (dict(

1560

zip(attribute.__code__.co_freevars,

1561

attribute.__closure__))

1562

["func"].cell_contents)

1106

1563

# Create a new, but exactly alike, function

1107

1564

# object, and decorate it to be a new D-Bus signal

1108

1565

# with the alternate D-Bus interface name

1566

new_function = copy_function(nonmethod_func)

1109

1567

new_function = (dbus.service.signal(

1110

alt_interface, attribute._dbus_signature)

1111

(types.FunctionType(

1112

nonmethod_func.func_code,

1113

nonmethod_func.func_globals,

1114

nonmethod_func.func_name,

1115

nonmethod_func.func_defaults,

1116

nonmethod_func.func_closure)))

1568

alt_interface,

1569

attribute._dbus_signature)(new_function))

1117

1570

# Copy annotations, if any

1118

1571

try:

1119

1572

new_function._dbus_annotations = dict(

1129

1582

func1 and func2 to the "call_both" function

1130

1583

outside of its arguments"""

1131

1584

1585

@functools.wraps(func2)

1132

1586

def call_both(*args, **kwargs):

1133

1587

"""This function will emit two D-Bus

1134

1588

signals by calling func1 and func2"""

1135

1589

func1(*args, **kwargs)

1136

1590

func2(*args, **kwargs)

1591

# Make wrapper function look like a D-Bus signal

1592

for name, attr in inspect.getmembers(func2):

1593

if name.startswith("_dbus_"):

1594

setattr(call_both, name, attr)

1137

1595

1138

1596

return call_both

1139

1597

# Create the "call_both" function and add it to

1150

1608

alt_interface,

1151

1609

attribute._dbus_in_signature,

1152

1610

attribute._dbus_out_signature)

1153

(types.FunctionType(attribute.func_code,

1154

attribute.func_globals,

1155

attribute.func_name,

1156

attribute.func_defaults,

1157

attribute.func_closure)))

1611

(copy_function(attribute)))

1158

1612

# Copy annotations, if any

1159

1613

try:

1160

1614

attr[attrname]._dbus_annotations = dict(

1172

1626

attribute._dbus_access,

1173

1627

attribute._dbus_get_args_options

1174

1628

["byte_arrays"])

1175

(types.FunctionType(

1176

attribute.func_code,

1177

attribute.func_globals,

1178

attribute.func_name,

1179

attribute.func_defaults,

1180

attribute.func_closure)))

1629

(copy_function(attribute)))

1181

1630

# Copy annotations, if any

1182

1631

try:

1183

1632

attr[attrname]._dbus_annotations = dict(

1192

1641

# to the class.

1193

1642

attr[attrname] = (

1194

1643

dbus_interface_annotations(alt_interface)

1195

(types.FunctionType(attribute.func_code,

1196

attribute.func_globals,

1197

attribute.func_name,

1198

attribute.func_defaults,

1199

attribute.func_closure)))

1644

(copy_function(attribute)))

1200

1645

if deprecate:

1201

1646

# Deprecate all alternate interfaces

1202

1647

iname="_AlternateDBusNames_interface_annotation{}"

1215

1660

if interface_names:

1216

1661

# Replace the class with a new subclass of it with

1217

1662

# methods, signals, etc. as created above.

1218

cls = type(b"{}Alternate".format(cls.__name__),

1219

(cls, ), attr)

1663

if sys.version_info.major == 2:

1664

cls = type(b"{}Alternate".format(cls.__name__),

1665

(cls, ), attr)

1666

else:

1667

cls = type("{}Alternate".format(cls.__name__),

1668

(cls, ), attr)

1220

1669

return cls

1221

1670

1222

1671

return wrapper

1343

1792

Client.__del__(self, *args, **kwargs)

1344

1793

1345

1794

def checker_callback(self, source, condition,

1346

(connection, command), *args, **kwargs):

1795

connection, command, *args, **kwargs):

1347

1796

ret = Client.checker_callback(self, source, condition,

1348

(connection, command), *args,

1797

connection, command, *args,

1349

1798

**kwargs)

1350

1799

exitstatus = self.last_checker_status

1351

1800

if exitstatus >= 0:

1352

1801

# Emit D-Bus signal

1353

1802

self.CheckerCompleted(dbus.Int16(exitstatus),

1354

dbus.Int64(0),

1803

# This is specific to GNU libC

1804

dbus.Int64(exitstatus << 8),

1355

1805

dbus.String(command))

1356

1806

else:

1357

1807

# Emit D-Bus signal

1358

1808

self.CheckerCompleted(dbus.Int16(-1),

1359

1809

dbus.Int64(

1360

self.last_checker_signal),

1810

# This is specific to GNU libC

1811

(exitstatus << 8)

1812

| self.last_checker_signal),

1361

1813

dbus.String(command))

1362

1814

return ret

1363

1815

1377

1829

1378

1830

def approve(self, value=True):

1379

1831

self.approved = value

1380

gobject.timeout_add(int(self.approval_duration.total_seconds()

1381

* 1000), self._reset_approved)

1832

GLib.timeout_add(int(self.approval_duration.total_seconds()

1833

* 1000), self._reset_approved)

1382

1834

self.send_changedstate()

1383

1835

1384

1836

## D-Bus methods, signals & properties

1440

1892

self.checked_ok()

1441

1893

1442

1894

# Enable - method

1895

@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})

1443

1896

@dbus.service.method(_interface)

1444

1897

def Enable(self):

1445

1898

"D-Bus method"

1446

1899

self.enable()

1447

1900

1448

1901

# StartChecker - method

1902

@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})

1449

1903

@dbus.service.method(_interface)

1450

1904

def StartChecker(self):

1451

1905

"D-Bus method"

1452

1906

self.start_checker()

1453

1907

1454

1908

# Disable - method

1909

@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})

1455

1910

@dbus.service.method(_interface)

1456

1911

def Disable(self):

1457

1912

"D-Bus method"

1458

1913

self.disable()

1459

1914

1460

1915

# StopChecker - method

1916

@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})

1461

1917

@dbus.service.method(_interface)

1462

1918

def StopChecker(self):

1463

1919

self.stop_checker()

1499

1955

self.approval_duration = datetime.timedelta(0, 0, 0, value)

1500

1956

1501

1957

# Name - property

1958

@dbus_annotations(

1959

{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})

1502

1960

@dbus_service_property(_interface, signature="s", access="read")

1503

1961

def Name_dbus_property(self):

1504

1962

return dbus.String(self.name)

1505

1963

1506

1964

# Fingerprint - property

1965

@dbus_annotations(

1966

{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})

1507

1967

@dbus_service_property(_interface, signature="s", access="read")

1508

1968

def Fingerprint_dbus_property(self):

1509

1969

return dbus.String(self.fingerprint)

1518

1978

self.host = str(value)

1519

1979

1520

1980

# Created - property

1981

@dbus_annotations(

1982

{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})

1521

1983

@dbus_service_property(_interface, signature="s", access="read")

1522

1984

def Created_dbus_property(self):

1523

1985

return datetime_to_dbus(self.created)

1584

2046

if (getattr(self, "disable_initiator_tag", None)

1585

2047

is None):

1586

2048

return

1587

gobject.source_remove(self.disable_initiator_tag)

1588

self.disable_initiator_tag = gobject.timeout_add(

2049

GLib.source_remove(self.disable_initiator_tag)

2050

self.disable_initiator_tag = GLib.timeout_add(

1589

2051

int((self.expires - now).total_seconds() * 1000),

1590

2052

self.disable)

1591

2053

1611

2073

return

1612

2074

if self.enabled:

1613

2075

# Reschedule checker run

1614

gobject.source_remove(self.checker_initiator_tag)

1615

self.checker_initiator_tag = gobject.timeout_add(

2076

GLib.source_remove(self.checker_initiator_tag)

2077

self.checker_initiator_tag = GLib.timeout_add(

1616

2078

value, self.start_checker)

1617

2079

self.start_checker() # Start one now, too

1618

2080

1638

2100

self.stop_checker()

1639

2101

1640

2102

# ObjectPath - property

2103

@dbus_annotations(

2104

{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",

2105

"org.freedesktop.DBus.Deprecated": "true"})

1641

2106

@dbus_service_property(_interface, signature="o", access="read")

1642

2107

def ObjectPath_dbus_property(self):

1643

2108

return self.dbus_object_path # is already a dbus.ObjectPath

1644

2109

1645

2110

# Secret = property

2111

@dbus_annotations(

2112

{"org.freedesktop.DBus.Property.EmitsChangedSignal":

2113

"invalidates"})

1646

2114

@dbus_service_property(_interface,

1647

2115

signature="ay",

1648

2116

access="write",

1658

2126

self._pipe = child_pipe

1659

2127

self._pipe.send(('init', fpr, address))

1660

2128

if not self._pipe.recv():

1661

raise KeyError()

2129

raise KeyError(fpr)

1662

2130

1663

2131

def __getattribute__(self, name):

1664

2132

if name == '_pipe':

1694

2162

logger.debug("Pipe FD: %d",

1695

2163

self.server.child_pipe.fileno())

1696

2164

1697

session = gnutls.connection.ClientSession(

1698

self.request, gnutls.connection .X509Credentials())

1699

1700

# Note: gnutls.connection.X509Credentials is really a

1701

# generic GnuTLS certificate credentials object so long as

1702

# no X.509 keys are added to it. Therefore, we can use it

1703

# here despite using OpenPGP certificates.

2165

session = gnutls.ClientSession(self.request)

1704

2166

1705

2167

#priority = ':'.join(("NONE", "+VERS-TLS1.1",

1706

2168

# "+AES-256-CBC", "+SHA1",

1710

2172

priority = self.server.gnutls_priority

1711

2173

if priority is None:

1712

2174

priority = "NORMAL"

1713

gnutls.library.functions.gnutls_priority_set_direct(

1714

session._c_object, priority, None)

2175

gnutls.priority_set_direct(session._c_object, priority,

2176

None)

1715

2177

1716

2178

# Start communication using the Mandos protocol

1717

2179

# Get protocol number

1727

2189

# Start GnuTLS connection

1728

2190

try:

1729

2191

session.handshake()

1730

except gnutls.errors.GNUTLSError as error:

2192

except gnutls.Error as error:

1731

2193

logger.warning("Handshake failed: %s", error)

1732

2194

# Do not run session.bye() here: the session is not

1733

2195

# established. Just abandon the request.

1739

2201

try:

1740

2202

fpr = self.fingerprint(

1741

2203

self.peer_certificate(session))

1742

except (TypeError,

1743

gnutls.errors.GNUTLSError) as error:

2204

except (TypeError, gnutls.Error) as error:

1744

2205

logger.warning("Bad certificate: %s", error)

1745

2206

return

1746

2207

logger.debug("Fingerprint: %s", fpr)

1804

2265

else:

1805

2266

delay -= time2 - time

1806

2267

1807

sent_size = 0

1808

while sent_size < len(client.secret):

1809

try:

1810

sent = session.send(client.secret[sent_size:])

1811

except gnutls.errors.GNUTLSError as error:

1812

logger.warning("gnutls send failed",

1813

exc_info=error)

1814

return

1815

logger.debug("Sent: %d, remaining: %d", sent,

1816

len(client.secret) - (sent_size

1817

+ sent))

1818

sent_size += sent

2268

try:

2269

session.send(client.secret)

2270

except gnutls.Error as error:

2271

logger.warning("gnutls send failed",

2272

exc_info = error)

2273

return

1819

2274

1820

2275

logger.info("Sending secret to %s", client.name)

1821

2276

# bump the timeout using extended_timeout

1829

2284

client.approvals_pending -= 1

1830

2285

try:

1831

2286

session.bye()

1832

except gnutls.errors.GNUTLSError as error:

2287

except gnutls.Error as error:

1833

2288

logger.warning("GnuTLS bye failed",

1834

2289

exc_info=error)

1835

2290

1837

2292

def peer_certificate(session):

1838

2293

"Return the peer's OpenPGP certificate as a bytestring"

1839

2294

# If not an OpenPGP certificate...

1840

if (gnutls.library.functions.gnutls_certificate_type_get(

1841

session._c_object)

1842

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1843

# ...do the normal thing

1844

return session.peer_certificate

2295

if (gnutls.certificate_type_get(session._c_object)

2296

!= gnutls.CRT_OPENPGP):

2297

# ...return invalid data

2298

return b""

1845

2299

list_size = ctypes.c_uint(1)

1846

cert_list = (gnutls.library.functions

1847

.gnutls_certificate_get_peers

2300

cert_list = (gnutls.certificate_get_peers

1848

2301

(session._c_object, ctypes.byref(list_size)))

1849

2302

if not bool(cert_list) and list_size.value != 0:

1850

raise gnutls.errors.GNUTLSError("error getting peer"

1851

" certificate")

2303

raise gnutls.Error("error getting peer certificate")

1852

2304

if list_size.value == 0:

1853

2305

return None

1854

2306

cert = cert_list[0]

1858

2310

def fingerprint(openpgp):

1859

2311

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1860

2312

# New GnuTLS "datum" with the OpenPGP public key

1861

datum = gnutls.library.types.gnutls_datum_t(

2313

datum = gnutls.datum_t(

1862

2314

ctypes.cast(ctypes.c_char_p(openpgp),

1863

2315

ctypes.POINTER(ctypes.c_ubyte)),

1864

2316

ctypes.c_uint(len(openpgp)))

1865

2317

# New empty GnuTLS certificate

1866

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1867

gnutls.library.functions.gnutls_openpgp_crt_init(

1868

ctypes.byref(crt))

2318

crt = gnutls.openpgp_crt_t()

2319

gnutls.openpgp_crt_init(ctypes.byref(crt))

1869

2320

# Import the OpenPGP public key into the certificate

1870

gnutls.library.functions.gnutls_openpgp_crt_import(

1871

crt, ctypes.byref(datum),

1872

gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)

2321

gnutls.openpgp_crt_import(crt, ctypes.byref(datum),

2322

gnutls.OPENPGP_FMT_RAW)

1873

2323

# Verify the self signature in the key

1874

2324

crtverify = ctypes.c_uint()

1875

gnutls.library.functions.gnutls_openpgp_crt_verify_self(

1876

crt, 0, ctypes.byref(crtverify))

2325

gnutls.openpgp_crt_verify_self(crt, 0,

2326

ctypes.byref(crtverify))

1877

2327

if crtverify.value != 0:

1878

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1879

raise gnutls.errors.CertificateSecurityError(

1880

"Verify failed")

2328

gnutls.openpgp_crt_deinit(crt)

2329

raise gnutls.CertificateSecurityError("Verify failed")

1881

2330

# New buffer for the fingerprint

1882

2331

buf = ctypes.create_string_buffer(20)

1883

2332

buf_len = ctypes.c_size_t()

1884

2333

# Get the fingerprint from the certificate into the buffer

1885

gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(

1886

crt, ctypes.byref(buf), ctypes.byref(buf_len))

2334

gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),

2335

ctypes.byref(buf_len))

1887

2336

# Deinit the certificate

1888

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2337

gnutls.openpgp_crt_deinit(crt)

1889

2338

# Convert the buffer to a Python bytestring

1890

2339

fpr = ctypes.string_at(buf, buf_len.value)

1891

2340

# Convert the bytestring to hexadecimal notation

2035

2484

gnutls_priority GnuTLS priority string

2036

2485

use_dbus: Boolean; to emit D-Bus signals or not

2037

2486

2038

Assumes a gobject.MainLoop event loop.

2487

Assumes a GLib.MainLoop event loop.

2039

2488

"""

2040

2489

2041

2490

def __init__(self, server_address, RequestHandlerClass,

2066

2515

2067

2516

def add_pipe(self, parent_pipe, proc):

2068

2517

# Call "handle_ipc" for both data and EOF events

2069

gobject.io_add_watch(

2518

GLib.io_add_watch(

2070

2519

parent_pipe.fileno(),

2071

gobject.IO_IN | gobject.IO_HUP,

2520

GLib.IO_IN | GLib.IO_HUP,

2072

2521

functools.partial(self.handle_ipc,

2073

2522

parent_pipe = parent_pipe,

2074

2523

proc = proc))

2078

2527

proc = None,

2079

2528

client_object=None):

2080

2529

# error, or the other end of multiprocessing.Pipe has closed

2081

if condition & (gobject.IO_ERR | gobject.IO_HUP):

2530

if condition & (GLib.IO_ERR | GLib.IO_HUP):

2082

2531

# Wait for other process to exit

2083

2532

proc.join()

2084

2533

return False

2091

2540

fpr = request[1]

2092

2541

address = request[2]

2093

2542

2094

for c in self.clients.itervalues():

2543

for c in self.clients.values():

2095

2544

if c.fingerprint == fpr:

2096

2545

client = c

2097

2546

break

2105

2554

parent_pipe.send(False)

2106

2555

return False

2107

2556

2108

gobject.io_add_watch(

2557

GLib.io_add_watch(

2109

2558

parent_pipe.fileno(),

2110

gobject.IO_IN | gobject.IO_HUP,

2559

GLib.IO_IN | GLib.IO_HUP,

2111

2560

functools.partial(self.handle_ipc,

2112

2561

parent_pipe = parent_pipe,

2113

2562

proc = proc,

2127

2576

2128

2577

if command == 'getattr':

2129

2578

attrname = request[1]

2130

if callable(client_object.__getattribute__(attrname)):

2579

if isinstance(client_object.__getattribute__(attrname),

2580

collections.Callable):

2131

2581

parent_pipe.send(('function', ))

2132

2582

else:

2133

2583

parent_pipe.send((

2168

2618

# avoid excessive use of external libraries.

2169

2619

2170

2620

# New type for defining tokens, syntax, and semantics all-in-one

2171

Token = collections.namedtuple("Token",

2172

("regexp", # To match token; if

2173

# "value" is not None,

2174

# must have a "group"

2175

# containing digits

2176

"value", # datetime.timedelta or

2177

# None

2178

"followers")) # Tokens valid after

2179

# this token

2180

2621

Token = collections.namedtuple("Token", (

2181

2622

"regexp", # To match token; if "value" is not None, must have

2182

2623

# a "group" containing digits

2217

2658

# Define starting values

2218

2659

value = datetime.timedelta() # Value so far

2219

2660

found_token = None

2220

followers = frozenset((token_duration,)) # Following valid tokens

2661

followers = frozenset((token_duration, )) # Following valid tokens

2221

2662

s = duration # String left to parse

2222

2663

# Loop until end token is found

2223

2664

while found_token is not token_end:

2240

2681

break

2241

2682

else:

2242

2683

# No currently valid tokens were found

2243

raise ValueError("Invalid RFC 3339 duration")

2684

raise ValueError("Invalid RFC 3339 duration: {!r}"

2685

.format(duration))

2244

2686

# End token found

2245

2687

return value

2246

2688

2379

2821

"debug": "False",

2380

2822

"priority":

2381

2823

"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"

2382

":+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",

2824

":+SIGN-DSA-SHA256",

2383

2825

"servicename": "Mandos",

2384

2826

"use_dbus": "True",

2385

2827

"use_ipv6": "True",

2497

2939

pidfilename = "/var/run/mandos.pid"

2498

2940

pidfile = None

2499

2941

try:

2500

pidfile = open(pidfilename, "w")

2942

pidfile = codecs.open(pidfilename, "w", encoding="utf-8")

2501

2943

except IOError as e:

2502

2944

logger.error("Could not open file %r", pidfilename,

2503

2945

exc_info=e)

2504

2946

2505

for name in ("_mandos", "mandos", "nobody"):

2947

for name, group in (("_mandos", "_mandos"),

2948

("mandos", "mandos"),

2949

("nobody", "nogroup")):

2506

2950

try:

2507

2951

uid = pwd.getpwnam(name).pw_uid

2508

gid = pwd.getpwnam(name).pw_gid

2952

gid = pwd.getpwnam(group).pw_gid

2509

2953

break

2510

2954

except KeyError:

2511

2955

continue

2515

2959

try:

2516

2960

os.setgid(gid)

2517

2961

os.setuid(uid)

2962

if debug:

2963

logger.debug("Did setuid/setgid to {}:{}".format(uid,

2964

gid))

2518

2965

except OSError as error:

2966

logger.warning("Failed to setuid/setgid to {}:{}: {}"

2967

.format(uid, gid, os.strerror(error.errno)))

2519

2968

if error.errno != errno.EPERM:

2520

2969

raise

2521

2970

2524

2973

2525

2974

# "Use a log level over 10 to enable all debugging options."

2526

2975

# - GnuTLS manual

2527

gnutls.library.functions.gnutls_global_set_log_level(11)

2976

gnutls.global_set_log_level(11)

2528

2977

2529

@gnutls.library.types.gnutls_log_func

2978

@gnutls.log_func

2530

2979

def debug_gnutls(level, string):

2531

2980

logger.debug("GnuTLS: %s", string[:-1])

2532

2981

2533

gnutls.library.functions.gnutls_global_set_log_function(

2534

debug_gnutls)

2982

gnutls.global_set_log_function(debug_gnutls)

2535

2983

2536

2984

# Redirect stdin so all checkers get /dev/null

2537

2985

null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)

2544

2992

# Close all input and output, do double fork, etc.

2545

2993

daemon()

2546

2994

2547

# multiprocessing will use threads, so before we use gobject we

2548

# need to inform gobject that threads will be used.

2549

gobject.threads_init()

2995

# multiprocessing will use threads, so before we use GLib we need

2996

# to inform GLib that threads will be used.

2997

GLib.threads_init()

2550

2998

2551

2999

global main_loop

2552

3000

# From the Avahi example code

2553

3001

DBusGMainLoop(set_as_default=True)

2554

main_loop = gobject.MainLoop()

3002

main_loop = GLib.MainLoop()

2555

3003

bus = dbus.SystemBus()

2556

3004

# End of Avahi example code

2557

3005

if use_dbus:

2562

3010

old_bus_name = dbus.service.BusName(

2563

3011

"se.bsnet.fukt.Mandos", bus,

2564

3012

do_not_queue=True)

2565

except dbus.exceptions.NameExistsException as e:

3013

except dbus.exceptions.DBusException as e:

2566

3014

logger.error("Disabling D-Bus:", exc_info=e)

2567

3015

use_dbus = False

2568

3016

server_settings["use_dbus"] = False

2601

3049

if server_settings["restore"]:

2602

3050

try:

2603

3051

with open(stored_state_path, "rb") as stored_state:

2604

clients_data, old_client_settings = pickle.load(

2605

stored_state)

3052

if sys.version_info.major == 2:

3053

clients_data, old_client_settings = pickle.load(

3054

stored_state)

3055

else:

3056

bytes_clients_data, bytes_old_client_settings = (

3057

pickle.load(stored_state, encoding = "bytes"))

3058

### Fix bytes to strings

3059

## clients_data

3060

# .keys()

3061

clients_data = { (key.decode("utf-8")

3062

if isinstance(key, bytes)

3063

else key): value

3064

for key, value in

3065

bytes_clients_data.items() }

3066

del bytes_clients_data

3067

for key in clients_data:

3068

value = { (k.decode("utf-8")

3069

if isinstance(k, bytes) else k): v

3070

for k, v in

3071

clients_data[key].items() }

3072

clients_data[key] = value

3073

# .client_structure

3074

value["client_structure"] = [

3075

(s.decode("utf-8")

3076

if isinstance(s, bytes)

3077

else s) for s in

3078

value["client_structure"] ]

3079

# .name & .host

3080

for k in ("name", "host"):

3081

if isinstance(value[k], bytes):

3082

value[k] = value[k].decode("utf-8")

3083

## old_client_settings

3084

# .keys()

3085

old_client_settings = {

3086

(key.decode("utf-8")

3087

if isinstance(key, bytes)

3088

else key): value

3089

for key, value in

3090

bytes_old_client_settings.items() }

3091

del bytes_old_client_settings

3092

# .host

3093

for value in old_client_settings.values():

3094

if isinstance(value["host"], bytes):

3095

value["host"] = (value["host"]

3096

.decode("utf-8"))

2606

3097

os.remove(stored_state_path)

2607

3098

except IOError as e:

2608

3099

if e.errno == errno.ENOENT:

2699

3190

2700

3191

if not foreground:

2701

3192

if pidfile is not None:

3193

pid = os.getpid()

2702

3194

try:

2703

3195

with pidfile:

2704

pid = os.getpid()

2705

pidfile.write("{}\n".format(pid).encode("utf-8"))

3196

print(pid, file=pidfile)

2706

3197

except IOError:

2707

3198

logger.error("Could not write to file %r with PID %d",

2708

3199

pidfilename, pid)

2709

3200

del pidfile

2710

3201

del pidfilename

2711

3202

2712

signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())

2713

signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())

3203

for termsig in (signal.SIGHUP, signal.SIGTERM):

3204

GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,

3205

lambda: main_loop.quit() and False)

2714

3206

2715

3207

if use_dbus:

2716

3208

2717

3209

@alternate_dbus_interfaces(

2718

3210

{ "se.recompile.Mandos": "se.bsnet.fukt.Mandos" })

2719

class MandosDBusService(DBusObjectWithProperties):

3211

class MandosDBusService(DBusObjectWithObjectManager):

2720

3212

"""A D-Bus proxy object"""

2721

3213

2722

3214

def __init__(self):

2724

3216

2725

3217

_interface = "se.recompile.Mandos"

2726

3218

2727

@dbus_interface_annotations(_interface)

2728

def _foo(self):

2729

return {

2730

"org.freedesktop.DBus.Property.EmitsChangedSignal":

2731

"false" }

2732

2733

3219

@dbus.service.signal(_interface, signature="o")

2734

3220

def ClientAdded(self, objpath):

2735

3221

"D-Bus signal"

2740

3226

"D-Bus signal"

2741

3227

pass

2742

3228

3229

@dbus_annotations({"org.freedesktop.DBus.Deprecated":

3230

"true"})

2743

3231

@dbus.service.signal(_interface, signature="os")

2744

3232

def ClientRemoved(self, objpath, name):

2745

3233

"D-Bus signal"

2746

3234

pass

2747

3235

3236

@dbus_annotations({"org.freedesktop.DBus.Deprecated":

3237

"true"})

2748

3238

@dbus.service.method(_interface, out_signature="ao")

2749

3239

def GetAllClients(self):

2750

3240

"D-Bus method"

2751

3241

return dbus.Array(c.dbus_object_path for c in

2752

tcp_server.clients.itervalues())

3242

tcp_server.clients.values())

2753

3243

3244

@dbus_annotations({"org.freedesktop.DBus.Deprecated":

3245

"true"})

2754

3246

@dbus.service.method(_interface,

2755

3247

out_signature="a{oa{sv}}")

2756

3248

def GetAllClientsWithProperties(self):

2757

3249

"D-Bus method"

2758

3250

return dbus.Dictionary(

2759

{ c.dbus_object_path: c.GetAll("")

2760

for c in tcp_server.clients.itervalues() },

3251

{ c.dbus_object_path: c.GetAll(

3252

"se.recompile.Mandos.Client")

3253

for c in tcp_server.clients.values() },

2761

3254

signature="oa{sv}")

2762

3255

2763

3256

@dbus.service.method(_interface, in_signature="o")

2764

3257

def RemoveClient(self, object_path):

2765

3258

"D-Bus method"

2766

for c in tcp_server.clients.itervalues():

3259

for c in tcp_server.clients.values():

2767

3260

if c.dbus_object_path == object_path:

2768

3261

del tcp_server.clients[c.name]

2769

3262

c.remove_from_connection()

2770

# Don't signal anything except ClientRemoved

3263

# Don't signal the disabling

2771

3264

c.disable(quiet=True)

2772

# Emit D-Bus signal

2773

self.ClientRemoved(object_path, c.name)

3265

# Emit D-Bus signal for removal

3266

self.client_removed_signal(c)

2774

3267

return

2775

3268

raise KeyError(object_path)

2776

3269

2777

3270

del _interface

3271

3272

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3273

out_signature = "a{oa{sa{sv}}}")

3274

def GetManagedObjects(self):

3275

"""D-Bus method"""

3276

return dbus.Dictionary(

3277

{ client.dbus_object_path:

3278

dbus.Dictionary(

3279

{ interface: client.GetAll(interface)

3280

for interface in

3281

client._get_all_interface_names()})

3282

for client in tcp_server.clients.values()})

3283

3284

def client_added_signal(self, client):

3285

"""Send the new standard signal and the old signal"""

3286

if use_dbus:

3287

# New standard signal

3288

self.InterfacesAdded(

3289

client.dbus_object_path,

3290

dbus.Dictionary(

3291

{ interface: client.GetAll(interface)

3292

for interface in

3293

client._get_all_interface_names()}))

3294

# Old signal

3295

self.ClientAdded(client.dbus_object_path)

3296

3297

def client_removed_signal(self, client):

3298

"""Send the new standard signal and the old signal"""

3299

if use_dbus:

3300

# New standard signal

3301

self.InterfacesRemoved(

3302

client.dbus_object_path,

3303

client._get_all_interface_names())

3304

# Old signal

3305

self.ClientRemoved(client.dbus_object_path,

3306

client.name)

2778

3307

2779

3308

mandos_dbus_service = MandosDBusService()

2780

3309

2793

3322

# removed/edited, old secret will thus be unrecovable.

2794

3323

clients = {}

2795

3324

with PGPEngine() as pgp:

2796

for client in tcp_server.clients.itervalues():

3325

for client in tcp_server.clients.values():

2797

3326

key = client_settings[client.name]["secret"]

2798

3327

client.encrypted_secret = pgp.encrypt(client.secret,

2799

3328

key)

2823

3352

prefix='clients-',

2824

3353

dir=os.path.dirname(stored_state_path),

2825

3354

delete=False) as stored_state:

2826

pickle.dump((clients, client_settings), stored_state)

3355

pickle.dump((clients, client_settings), stored_state,

3356

protocol = 2)

2827

3357

tempname = stored_state.name

2828

3358

os.rename(tempname, stored_state_path)

2829

3359

except (IOError, OSError) as e:

2845

3375

name, client = tcp_server.clients.popitem()

2846

3376

if use_dbus:

2847

3377

client.remove_from_connection()

2848

# Don't signal anything except ClientRemoved

3378

# Don't signal the disabling

2849

3379

client.disable(quiet=True)

3380

# Emit D-Bus signal for removal

2850

3381

if use_dbus:

2851

# Emit D-Bus signal

2852

mandos_dbus_service.ClientRemoved(

2853

client.dbus_object_path, client.name)

3382

mandos_dbus_service.client_removed_signal(client)

2854

3383

client_settings.clear()

2855

3384

2856

3385

atexit.register(cleanup)

2857

3386

2858

for client in tcp_server.clients.itervalues():

3387

for client in tcp_server.clients.values():

2859

3388

if use_dbus:

2860

# Emit D-Bus signal

2861

mandos_dbus_service.ClientAdded(client.dbus_object_path)

3389

# Emit D-Bus signal for adding

3390

mandos_dbus_service.client_added_signal(client)

2862

3391

# Need to initiate checking of clients

2863

3392

if client.enabled:

2864

3393

client.init_checker()

2890

3419

sys.exit(1)

2891

3420

# End of Avahi example code

2892

3421

2893

gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,

2894

lambda *args, **kwargs:

2895

(tcp_server.handle_request

2896

(*args[2:], **kwargs) or True))

3422

GLib.io_add_watch(tcp_server.fileno(), GLib.IO_IN,

3423

lambda *args, **kwargs:

3424

(tcp_server.handle_request

3425

(*args[2:], **kwargs) or True))

2897

3426

2898

3427

logger.debug("Starting main loop")

2899

3428

main_loop.run()